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First muon-neutrino disappearance study with an off-axis beam

Abe, K. and Abgrall, N. and Ajima, Y. and Aihara, H. and Albert, J. B. and Andreopoulos, C. and Andrieu, B. and Anerella, M. D. and Aoki, S. and Araoka, O. and Argyriades, J. and Ariga, A. and Ariga, T. and Assylbekov, S. and Autiero, D. and Badertscher, A. and Barbi, M. and Barker, G. J. and Barr, G. and Bass, M. and Batkiewicz, M. and Bay, F. and Bentham, S. and Berardi, V. and Berger, B. E. and Bertram, I. and Besnier, M. and Beucher, J. and Beznosko, D. and Bhadra, S. and Blaszczyk, F. d. M. and Blocki, J. and Blondel, A. and Bojechko, C. and Bouchez, J. and Boyd, S. B. and Bravar, A. and Bronner, C. and Brook-Roberge, D. G. and Buchanan, N. and Budd, H. and Calland, R. and Calvet, D. and Rodriguez, J. Caravaca and Cartwright, S. L. and Carver, A. and Castillo, R. and Catanesi, M. G. and Cazes, A. and Cervera, A. and Chavez, C. and Choi, S. and Christodoulou, G. and Coleman, J. and Collazuol, G. and Coleman, W. and Connolly, K. and Curioni, A. and Dabrowska, A. and Danko, I. and Das, R. and Davies, G. S. and Davis, S. and Day, M. and Rosa, G. De and André, J. P. A. M. de and Perio, P. de and Dealtry, T. and Delbart, A. and Densham, C. and Lodovico, F. Di and Luise, S. Di and Tran, P. Dinh and Dobson, J. and Dore, U. and Drapier, O. and Duboyski, T. and Dufour, F. and Dumarchez, J. and Dytman, S. and Dziewiecki, M. and Dziomba, M. and Emery, S. and Ereditato, A. and Escallier, J. E. and Escudero, L. and Esposito, L. S. and Fechner, M. and Ferrero, A. and Finch, A. J. and Frank, E. and Fujii, Y. and Fukuda, Y. and Galymov, V. and Ganetis, G. L. and Gannaway, F. C. and Gaudin, A. and Gendotti, A. and George, M. A. and Giffin, S. and Giganti, C. and Gilje, K. and Ghosh, A. K. and Golan, T. and Goldhaber, M. and Gomez-Cadenas, J. J. and Gomi, S. and Gonin, M. and Grant, N. and Grant, A. and Gumplinger, P. and Guzowski, P. and Hadley, D. R. and Haesler, A. and Haigh, M. D. and Hamano, K. and Hansen, C. and Hansen, D. and Hara, T. and Harrison, P. F. and Hartfiel, B. and Hartz, M. and Haruyama, T. and Hasegawa, T. and Hastings, N. C. and Hatzikoutelis, A. and Hayashi, K. and Hayato, Y. and Hearty, C. and Helmer, R. L. and Henderson, R. and Higashi, N. and Hignight, J. and Hillairet, A. and Hiraki, T. and Hirose, E. and Holeczek, J. and Horikawa, S. and Huang, K. and Hyndman, A. and Ichikawa, A. K. and Ieki, K. and Ieva, M. and Iida, M. and Ikeda, M. and Ilic, J. and Imber, J. and Ishida, T. and Ishihara, C. and Ishii, T. and Ives, S. J. and Iwasaki, M. and Iyogi, K. and Izmaylov, A. and Jamieson, B. and Johnson, R. A. and Joo, K. K. and Jover-Manas, G. V. and Jung, C. 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F. and Murdoch, M. and Murphy, S. and Myslik, J. and Nagai, N. and Nakadaira, T. and Nakahata, M. and Nakai, T. and Nakajima, K. and Nakamoto, T. and Nakamura, K. and Nakayama, S. and Nakaya, T. and Nakayoshi, K. and Naples, D. and Navin, M. L. and Nicholls, T. C. and Nielsen, B. and Nielsen, C. and Nishikawa, K. and Nishino, H. and Nitta, K. and Nobuhara, T. and Nowak, J. A. and Obayashi, Y. and Ogitsu, T. and Ohhata, H. and Okamura, T. and Okumura, K. and Okusawa, T. and Oser, S. M. and Otani, M. and Owen, R. A. and Oyama, Y. and Ozaki, T. and Pac, M. Y. and Palladino, V. and Paolone, V. and Paul, P. and Payne, D. and Pearce, G. F. and Perkin, J. D. and Pettinacci, V. and Pierre, F. and Poplawska, E. and Popov, B. and Posiadala, M. and Poutissou, J. -M. and Poutissou, R. and Przewlocki, P. and Qian, W. and Raaf, J. L. and Radicioni, E. and Ratoff, P. N. and Raufer, T. M. and Ravonel, M. and Raymond, M. and Retiere, F. and Robert, A. and Rodrigues, P. A. and Rondio, E. and Roney, J. 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M. and Tanimoto, N. and Tashiro, K. and Taylor, I. and Terashima, A. and Terhorst, D. and Terri, R. and Thompson, L. F. and Thorley, A. and Toki, W. and Tobayama, S. and Tomaru, T. and Totsuka, Y. and Touramanis, C. and Tsukamoto, T. and Tzanov, M. and Uchida, Y. and Ueno, K. and Vacheret, A. and Vagins, M. and Vasseur, G. and Veledar, O. and Wachala, T. and Walding, J. J. and Waldron, A. V. and Walter, C. W. and Wanderer, P. J. and Wang, J. and Ward, M. A. and Ward, G. P. and Wark, D. and Wascko, M. O. and Weber, A. and Wendell, R. and West, N. and Whitehead, L. H. and Wikström, G. and Wilkes, R. J. and Wilking, M. J. and Williamson, Z. and Wilson, J. R. and Wilson, R. J. and Wongjirad, T. and Yamada, S. and Yamada, Y. and Yamamoto, A. and Yamamoto, K. and Yamanoi, Y. and Yamaoka, H. and Yamauchi, T. and Yanagisawa, C. and Yano, T. and Yen, S. and Yershov, N. and Yokoyama, M. and Yuan, T. and Zalewska, A. and Zalipska, J. and Zambelli, L. and Zaremba, K. and Ziembicki, M. and Zimmerman, E. D. and Zito, M. and Zmuda, J. (2012) First muon-neutrino disappearance study with an off-axis beam. Physical Review D, 85 (3). ISSN 1550-7998

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    We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km muon-neutrino beam from Tokai to Kamioka is the first implementation of the off-axis technique in a long-baseline neutrino oscillation experiment. With data corresponding to 1.43 x 10(20) protons on target, we observe 31 fully-contained single mu-like ring events in Super-Kamiokande, compared with an expectation of 104 +/- 14 (syst) events without neutrino oscillations. The best-fit point for two-flavor nu(mu) -> nu(tau) oscillations is sin(2)(2 theta(23)) = 0.98 and vertical bar Delta m(32)(2)vertical bar = 2.65 x 10(-3) eV(2). The boundary of the 90% confidence region includes the points sin(2)(2 theta(23)), vertical bar Delta m(32)(2)vertical bar = (1.0, 3.1 x 10(-3) eV(2)), (0.84, 2.65 x 10(-3) eV(2)) and (1.0, 2.2 x 10(-3) eV(2)).

    Item Type: Journal Article
    Journal or Publication Title: Physical Review D
    Additional Information: © 2012 American Physical Society
    Departments: Faculty of Science and Technology > Physics
    ID Code: 64291
    Deposited By: ep_importer_pure
    Deposited On: 01 May 2013 09:52
    Refereed?: Yes
    Published?: Published
    Last Modified: 25 Jun 2018 00:23
    Identification Number:

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